<!--
@BLINK-ALLOW:className*
@WAIT-FOR:done
-->
<style>
.hidden {
  content-visibility: hidden;
}
</style>
<div id="container">
  <div role="group" id="target" aria-labelledby="target_label">
    target
    <div id="child">
      child
    </div>
    <div id="target_label">Label</div>
  </div>
</div>

<script>
  document.addEventListener('DOMContentLoaded', () => {
    setTimeout(() => {
      document.querySelector('#target').classList.add("hidden");
      document.title='done';
    }, 50);
  });
</script>
